JPH03293175A - Ink jet recording apparatus - Google Patents

Abstract

PURPOSE:To prevent the generation of the disturbance of an image even when the back feed of a printing medium is performed immediately after recording by arranging spurs each having a peripheral surface formed into a rotary shape continuously coming into contact with a recording medium before and behind a recording medium feed direction. CONSTITUTION:A spur feed roller pair 13 and a spur paper discharge roller pair 14 each of which becomes a spur on the side of the recording surface thereof are provided. A recording medium P is fed by a paper feed roller pair 12 to be set and, thereafter, one line is recorded on the recording medium P by the movement of a cartridge 1 having a recording head built therein in the sub-scanning direction of a carriage 2. Next, the recording medium 1 is fed in a main scanning direction by the forward rotation of the spur feed roller pair 13. When the spur feed roller pair 13 is forwardly rotated and the back feed of the recording medium P is performed, there is possibility such that the ink not fixed on the recording medium is rubbed with rollers to bring about the disturbance of an image but, since each of the rollers are constituted of a spur, the disturbance of an image is not generated.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to an inkjet recording device that performs recording by ejecting a recording liquid onto a recording medium such as paper or film, and particularly relates to an inkjet recording device that performs recording by discharging a recording liquid onto a recording medium such as paper or film, and particularly relates to a recording medium conveyance device applied thereto. This relates to the conveyance system of the recording medium in the mechanism.

[Prior Art] In recent years, OA devices such as personal computers and word processors have become widespread, and there are many recording methods for printing out information input with these devices, such as the wire tod method, thermal transfer method, and inkjet method. These recording systems perform predetermined recording on a conveyed recording sheet using recording heads of each type, and there are significant differences between the respective recording heads.

Before printing, the printing apparatus feeds a printing medium and sets it so that it can print. The flow of setting the printing medium in the printing apparatus will be explained with reference to the drawings.

Figure 2 shows a state in which a recording medium is set in a recording device, where 1 is a cartridge in which a recording head and an ink tank are integrated, and 2 is a carriage on which the cartridge is placed and scanned in the sub-scanning direction. 3 is a guide shaft of the carriage, and 4 is a conveyance guide for the recording medium. 5 is a platen roller for conveyance; 6.
7 is also a conveyance roller T for conveyance. 8 is a paper discharge roller for discharging the recording medium, and 9 is a roller that supports the paper discharge roller. P indicates a recording medium.

The recording medium P that rushes in from the conveyor roller 6 in the figure is
It is guided by the conveyance guide 4 and conveyed to the position of the conveyance roller H at 7, enters the conveyance guide 4, and after entering, it runs along the conveyance guide 4 again.
The paper ejection roller 8 and the paper ejection roller holder in the A direction in the figure are rollers 9.
The recording medium is conveyed to the position shown in FIG. 2, and the setting of the recording medium is completed.

Here, the paper discharge roller 8 comes into contact with the recording surface immediately after recording, so in an inkjet recording apparatus, the unfixed ink is transferred to the paper discharge roller 8, and the transferred ink is reprinted onto the recording medium. There was a problem in that the recording surface was stained by the transfer. In order to prevent this, the shape of the circumferential surface of the paper ejection roller 8 is prevented by using the above-mentioned spur, which is a rotating member that continuously contacts the recording medium.

[Problems to be Solved by the Invention] In the conventional recording medium conveyance system, by using a spur discharge roller, it is possible to prevent the recording surface from becoming stained during conveyance in the main scanning direction. However, when the recording medium is conveyed in the opposite direction to the main scanning direction and a so-called pack feed is performed, the recording surface is rubbed by the conveyance guide or the conveyance row, causing stains on the recording surface.

The above-mentioned problem does not occur in wire tod recording systems or thermal transfer recording systems. This is a particular weakness of inkjet recording apparatuses that perform recording by ejecting liquid ink.

The present invention aims to solve the above-mentioned problems and provide an inkjet recording apparatus that can prevent image disturbance even if pack feeding is performed immediately after recording.

[Summary of the Invention J The present invention has an ink tank containing ink,
In an inkjet recording apparatus that is equipped with an inkjet recording head that discharges ink supplied from the ink tank and that performs recording by discharging ink droplets from the recording head onto a recording medium, there is a circular This is an inkjet recording apparatus characterized by disposing a spur whose surface has a rotating shape that continuously contacts a recording medium. According to the present invention, it is possible to provide an inkjet recording apparatus that has no restrictions on the conveyance direction immediately after recording and has a variety of recording modes.

The present invention that solves the above problem includes disposing spurs whose circumferential surfaces have a rotating shape that continuously contacts the recording medium at the front and rear of the recording medium conveyance direction, and a conveyance guide is disposed on the recording surface side of the recording medium. The inkjet recording apparatus is characterized in that the conveyance system is provided with a conveyance guide means in which the recording medium does not come into contact with the conveyance guide after the recording medium has been set in the recording apparatus. According to this configuration, it is possible to prevent the problem of disturbing a recorded image due to unfixed ink, regardless of the conveying and scanning direction of the recording medium, for example, even when pack feeding is performed in an inkjet recording apparatus.

The present inventors first discovered an invention related to a roller for conveying a recording medium used in an inkjet recording apparatus that performs recording by discharging a recording liquid onto a recording medium such as paper or film. It prevents the printing surface from becoming dirty and the recording medium gets caught, causing jams. It also prevents the recording medium from lifting up due to deformation such as curling when printing solid printing or graphics with a high printing duty, and prevents the paper from being ejected. In addition, the bin-feed version can handle a variety of recording media such as postcards, cut paper, and QUIP film, and is suitable for office automation equipment such as small, portable laptop computers and word processors, and can be used in about 2 seconds. This invention is ideal for devices in which the printing surface is sent to the spur position after printing, and is also highly effective for printing with a large amount of ink, such as color images. As mentioned above, it is proposed as a solution to both the paper feeding system problem and the problem of spur marks on the printing surface at the same time. According to this proposed invention, the paper feeding member, typified by a spur, that rotates while contacting the recording medium after printing is characterized in that the peripheral surface thereof is shaped to continuously contact the recording medium. By providing a roller that
In principle, the ink on the surface of the recording medium is not transferred onto the spurs even before it is fixed, making it possible to achieve both transportability and printing without spur traces.

Basically, when a spur comes into contact with ink, the balance of adhesion forces is determined by the surface bonding force between the spur and ink, the bonding force between the ink and paper, and the cohesive force of the ink itself. By using the shape of this invention that takes advantage of this force balance characteristic, when the spur moves, the force attached to the spur is always lower (by doing so, the ink on the spur is lower). This invention has found that non-transfer can be achieved.

The present invention is an optimization of the previously proposed invention, and as explained above, by using a paper conveying member whose circumferential surface is in continuous contact with the printing surface, it is possible to create a compact and portable printer. However, even when printing with a high printing ratio on plain paper, or even under harsh environments such as high temperatures, it is effective in not causing print stains such as spur marks, etc. due to its extremely simple principle and structure. It has become possible.

[Example] Next, an example to which the above means is applied will be specifically described with reference to the drawings.

(First Embodiment) FIG. 1 is an explanatory diagram of an inkjet type recording apparatus.

First, the overall configuration of the printing apparatus will be explained. In the figure, 1 is a cartridge in which a print head and an ink tank are integrated, 2 is a carriage on which the cartridge is placed and scanned in the sub-scanning direction, and 3
is the guide axis of the carriage. 12 is a pair of paper feed rollers with a notch, 13 is a pair of spur transport rollers with spurs on the recording surface side, and 14 is a pair of spur paper discharge rollers with spurs on the recording surface side. . P indicates a recording medium.

Next, to explain the operation in the above configuration, a recording medium indicated by P in FIG. 1 is fed by a paper feed roller pair 12, is set as shown in FIG. The built-in cartridge records one line on the recording medium P by the movement of the carriage 2 in the sub-scanning direction. Next, the recording medium is sent in the main scanning direction by normal rotation of the 13 spur conveyor roller pairs (rotating in the C direction in the figure).

In the above device, if the 13 pairs of spur conveyor rollers rotate in the opposite direction to perform backfeed, there is a risk that the unfixed ink on the recording medium will be rubbed by the rollers, causing image distortion. Since the roller is composed of the spurs described above, image disturbance does not occur.

In other words, even if backfeed is performed and the spur comes into contact with unfixed ink, the ink will stick to the spur due to the surface bonding force between the spur and the ink, the bonding force between the ink and the recording medium, and the cohesive force of the ink itself. Since the balance is maintained so that the adhesion force is always lower, ink is not transferred to the spurs and image disturbances do not occur.

Taking advantage of the fact that the principle of transfer and non-transfer of ink to the spur is independent of the scanning direction of the recording medium, as mentioned above, the shape of the circumferential surface of the recording medium is continuous in the front and back of the recording medium's conveying direction. By adopting a structure in which a rotating spur (solo pan ball) is placed in contact with the recording medium, it is possible to prevent the unfixed recording surface from rubbing and causing image disturbance on the recording surface, regardless of the scanning direction of the recording medium. It becomes possible.

(Second Example) Next, in a conveyance system in which a conveyance guide is arranged on the recording surface side of a recording medium, the recording medium does not come into contact with the conveyance guide after the recording medium is set in the recording device. Let's discuss an example.

FIG. 8 is an explanatory diagram of an inkjet type recording apparatus.

First, the overall configuration of the printing apparatus will be explained. In the figure, 1 is a cartridge in which a print head and an ink tank are integrated, 2 is a carriage for carrying the cartridge and scanning in the sub-scanning direction, and 3 is a carriage for scanning in the sub-scanning direction. It is a guide shaft of the carriage, and 4' indicates a conveyance guide of the recording medium. 5
is a platen roller for conveyance, and 6 is also a conveyance roller for conveyance. Reference numeral 8 represents a paper ejection roller (the above-mentioned spur) for ejecting the recording medium, 9 represents a roller that supports the conveying roller, and 10 represents a spur roller presser. P indicates a recording medium.

Next, to explain the operation in the above configuration, after the recording medium indicated by P in FIG. 1 is set as shown in FIG. One line is recorded on the recording medium of P by the movement to . Next, the platen roller 5 rotates normally (rotates in the direction of arrow B in the figure), thereby transporting the recording medium in the main scanning direction.

In the above device, when the platen roller 5 rotates in the reverse direction and pack feeding is performed, there is a risk that the unfixed ink on the recording medium will be rubbed and cause image holes, but in this embodiment, the recording surface is not rubbed. It is configured like this.

A means for preventing the recording surface from being rubbed will be explained below.

FIGS. 3, 4, and 5 are explanatory views showing how the recording medium is set.

As shown in FIG. 3, when the recording medium P is fed, the leading edge first hits the conveyance guide 4, and then the recording medium P is conveyed along the conveyance guide 4 as shown in FIG. The leading edge of the recording medium P abuts against the spur roller pattern holder 10, is caught, and is conveyed in six directions as shown in FIG. 5.

Then, as shown in FIG. 1, the paper discharge roller 8 and the receiver are engaged with the roller 9.

Here, in the recording apparatus in this embodiment, the conveyance force between the platen roller 5 and the conveyance roller 1 2 is thicker than the conveyance force between the rollers 9 (, platen The recording medium conveyance speed of roller 5 is
It is slower than the conveyance speed of the paper discharge roller 8. That is, the force and speed of conveying the recording medium P are controlled by the platen roller 5, and the discharge roller 8 rotates at high speed while slipping in order to give tension to the recording medium P. Since the technique of intentionally varying the recording medium conveyance speed between the rollers conveying the recording medium is a known technique, a detailed explanation will be omitted here.

In this embodiment, the recording medium P is fed to the paper ejection roller 8.
When the recording medium P is caught in the sheet, the conveyance speed of the discharge roller 8 is faster than the conveyance speed of the platen roller 5, so the slack of the recording medium P between the platen roller 5 and the conveyance guide 4 is absorbed, and the fifth As shown in the figure, a gap is created between the recording medium P and the conveyance guide 4.

By creating a gap here, it is possible to prevent misalignment between the recording surface of the recording medium P and the conveyance guide 4 even when pack feeding is performed.

The spur roller pattern holder 10 is a rotating spur whose circumferential surface is in continuous contact with the recording medium and is used as a paper ejection roller, so the recording surface is not smudged by the spur roller pattern holder 10. It will not be disturbed or disturbed.

Regarding the type and number of recording heads installed, for example, in addition to a single head that corresponds to a single color of ink, there is also one that corresponds to multiple heads with different recording colors and densities. Good too.

As mentioned above, when the recording medium is set in the recording apparatus by disposing spurs whose circumferential surface has a rotational shape that continuously contacts the recording medium at the front and rear of the conveyance direction of the recording medium, the recording medium is By providing a conveyance guide means that does not touch the conveyance guide, even in the case of a conveyance system in which the conveyance guide is placed on the recording surface side of the recording medium, it is possible to scrape and record on the unfixed recording surface regardless of the scanning direction of the recording medium. It is possible to prevent side image disturbance from occurring.

[Third Embodiment] Next, another embodiment in which the recording medium does not come into contact with the conveyance guide when the recording medium is set in the recording apparatus will be described.

In the above embodiment, contact was prevented by providing a gap (1) between the recording medium P and the conveyance guide 4 as shown in FIG.
The wider the better.

However, if the gap (1) is widened, the angle at which the leading edge of the recording medium enters the spur roller pattern presser 10 when the recording medium is fed changes, and the impact of entry increases.

The reason why ink is not transferred even when the spur roller pattern presser 10 contacts a recorded image with unfixed ink is that the shape of its peripheral surface is such that it can continuously contact the recording medium. If the leading edge of the recording medium causes scratches or chips on the circumferential surface, the spur function for preventing ink transfer is degraded.

Furthermore, since the paper ejection roller using spurs is rotated at a higher speed than the conveyance speed of the recording medium and is used with slippage, the peripheral surface is subject to severe wear.

That is, the configuration of the above embodiment is not suitable for a model that requires a large number of durable sheets.

As an embodiment suitable for a model that requires a large number of durable sheets, a configuration as shown in FIGS. 6 and 7 may be used.

FIG. 6 is a sectional view illustrating this embodiment, and FIG. 7 is an enlarged view of the conveyance guide portion, which is the main part of this embodiment.

As shown in FIGS. 6 and 7, the recording medium P of the conveyance guide 4
The configuration is such that the guide spur 11 is disposed on the guiding surface. With this, 1) the recording surface of the recording medium P is supported by the guide spur 11,
Do not come into direct contact with the guide surface of the conveyance guide 4.

2) Since the gap between the platen roller 5 and the conveyance guide 4 can be narrowed to the necessary minimum, the impact force of the edge of the recording medium P entering the spur roller pattern presser 10 during paper feeding can be minimized.

3) Since the recording medium P does not have slack between the platen roller 55 6 and the conveyance guide 4 during paper feeding,
It is not necessary to use the paper ejection roller 8, which is a spur, while rotating it at a higher speed than the conveyance speed of the recording medium P and causing it to slip.

Therefore, in this embodiment, it is possible to reduce the frequency of occurrence of troubles such as wear/scratches/chips on the paper discharge roller 8 and the spur roller pattern holder 10, which are spurs, so that high durability can be achieved.

Further, in this embodiment, the number of guide spurs 11 arranged is three, but the number of guide spurs 11 may be more than three or less than three as required.

The configuration and operation other than the configuration means that prevents the recording medium from coming into contact with the conveyance guide when the recording medium is set in the recording apparatus are the same as those of the previous embodiment, so the explanation will be omitted.

Here, the spur configuration applied to the present invention will be explained.

Table 1 shows the shape of the taper shown in Figures 9 and 10 in this example, with an angle of 80' with the printing surface, and the surface Φ water repellency was determined by setting the contact pressure to the paper surface at 20 g. This is a test to see if spur marks appear on different samples under different humidity environments by printing a solid black line and then home-feeding it immediately.

Table 2 shows similar tests conducted with a sawtooth shape and other conditions being the same.

Table 3 shows the results of the tests shown in Table 1, with the surface roughness of the spur changed.

Table 4 shows the results of the test shown in Table 1, in which a water repellent material with a water repellency of 110° was used and the angle between the tapered part and the printing surface was changed.

The water repellency test was conducted using the contact angle with water as a parameter. The contact pressure test was expressed as the total pressure per spur against the printing surface.

(Leaving space below) Table 1 Table 2 Table 3 Table 4 When the spur in Figure 9.10 moves relative to the contact point, the ink will adhere to the spur surface at the energy level between the spur and the ink. When it is torn off due to the rotation of the spur, it becomes more raised than when it is at rest. However, the shape at that time is a shape with a widened base with the raised point as the apex. Considering the balance of forces at that time, the shape of the circumferential surface of the spur is a continuous surface, and at the point where the ink is dragged up in proportion to the adhesion force to the spur, the mountain-shaped bulge of the ink itself is reduced. The cohesive force due to surface tension that tries to reduce the surface area becomes stronger, and since the underside of the ink is constrained by the adhesive force between the ink and the recording medium over a large area, it ends up moving toward the recording medium. You will be dragged down while sliding. Thereby, the ink can be used without being transferred onto the spur. If there is a discontinuous surface in the circumferential shape of a conventional spur, the above-mentioned balance of forces will be shifted, and ink will be left on the spur at that point. Ninety extreme examples are shown in Table 2. Because it is a discontinuous surface, the force that pulls down the adhered ink is continuous as in the present invention, and the bulge of the mountain-shaped base is small and is applied to individual contact points, making it difficult to use. It is lifted perpendicularly from the printing surface, creating a constriction between the ink on the spur and the ink on the recording medium, and in the end, the film area at the constriction becomes the smallest. This becomes weak and the ink transfers onto the spur.

According to Table 1, when other parameters are fixed, in this example, if a water-repellent spur with a water contact angle of 60° or more is used, the ink fixation property will be excellent regardless of the environmental humidity. You can see that you can get spurs that have nothing to do with evil. Conversely, as shown in Table 2, with conventional spurs, transfer occurs even when using spurs with extremely high water repellency of 110° or more, indicating that the data is dependent on environmental humidity. . This is obvious when considering the above-mentioned principle, and since the spur in the present invention is originally not transferred due to the above-mentioned principle even if it is rolled in the ink liquid, unfixed ink under high humidity is transferred. It is okay to pass above. NG at a contact angle of 30” under high temperature in Table 1
It is thought that the reason for this is that the setting of the present example was such that there was a boundary between good and bad depending on the water repellency parameter in this vicinity.

According to the data of the conventional example in Table 2, it is sufficient to use a material with a contact angle of 110° or more at room temperature of 50% RH, but this level is just at the level where the ink has begun to set. This is thought to be because the viscosity has increased, and the adhesion force to the recording medium is slightly stronger based on the above-mentioned principle.

Furthermore, the reason why everything is OK under the low humidity of 10% RH is not due to the above-mentioned principle, but because it is already dry due to the ultra-low temperature and transfer no longer occurs.

In addition, Table 3 shows the surface roughness of the spurs changed in the embodiment according to the method of the invention, but here, for convenience, Rm
The numerical value for ax was set as a parameter, but as expected, the smaller the surface roughness, the better the force that drags down the ink is the better the slippage and the lower the resistance. Although they are the same, they differ in roughness, shape, etc., and their quality is determined by the combination with the adhesion due to water repellency.

Table 4 shows changes depending on the angle formed with the printed surface, and the results were better when the angle was as close to perpendicular to the printed surface as possible. This is because when the ink is dragged down from the spur, a peeling force is applied in a direction perpendicular to the printed surface, and the results show that it is better to easily apply force in this direction. .

The above-mentioned spur does not need to have a circular circumferential surface; it may be polygonal, elliptical, or irregularly shaped like a belt.The important thing is that the contact with the ink is not broken near the contact point (continuous). That's fine.

The present invention particularly relates to a bubble jet recording head proposed by Canon Co., Ltd. among inkjet recording systems.
This provides excellent effects in recording devices.

As for typical configurations and principles thereof, it is preferable to use the basic principles disclosed in, for example, US Pat. No. 4,723,129 and US Pat. No. 4,740,796. This method can be applied to both the so-called on-demand type and continuous type, but especially in the case of the on-demand type, it is necessary to arrange the liquid (ink) in accordance with the sheet and liquid path that hold it. As an electrothermal converter,
By applying at least one drive signal corresponding to recorded information and providing a rapid temperature rise above nucleate boiling, the electrothermal transducer generates thermal energy to cause film boiling on the thermally active surface of the recording head. As a result, bubbles in the liquid (ink) can be formed in one-to-one correspondence with this drive signal, which is effective. The growth and contraction of the bubble causes liquid (ink) to be ejected through the ejection opening to form at least one drop. It is more preferable to use a pulsed drive signal for this drive signal, since the growth and contraction of bubbles can be carried out immediately and appropriately, so that liquid (ink) ejection 3 4 with particularly excellent responsiveness can be achieved. This pulse-shaped drive signal is described in US Pat. No. 4,463,359 and US Pat.
345262 are suitable. Further, if the conditions described in US Pat. No. 4,313,124 concerning the temperature increase rate of the heat acting surface are adopted, even more excellent recording can be achieved.

The configuration of the recording head includes, in addition to the combined configuration of ejection ports, wave paths, and electrothermal converters (straight liquid flow path or right-angled liquid flow path) as disclosed in the above-mentioned specifications, a heat acting part. U.S. Pat. No. 4,558,333 and U.S. Pat. No. 4,459,600 which disclose arrangements placed in bending regions.
The present invention also includes a configuration using the specification of the above specification.

In addition, Japanese Patent Application Laid-open No. 123670 of 1982 discloses a configuration in which a common slit is used as a discharge part for a plurality of electrothermal converters, and a hole that absorbs pressure waves of thermal energy is disclosed. The present invention is also effective as a configuration based on Japanese Patent Application Laid-Open No. 138461 of 1982, which discloses a configuration in which the discharge portion corresponds to the discharge portion.

Furthermore, as a full-line type recording head having a length corresponding to the width of the maximum recording medium that can be recorded by the recording apparatus, the length can be increased by combining multiple recording heads as disclosed in the above-mentioned specification. Either a configuration that satisfies the above requirements or a configuration as a single recording head formed integrally may be used, but the present invention can more effectively exhibit the above-mentioned effects.

In addition, a replaceable chip-type recording head that is attached to the device body enables electrical connection to the device body and ink supply from the device body, or a chip-type recording head that is installed integrally with the recording head itself. The present invention is also effective when a cartridge type recording head is used.

Further, it is preferable to add recovery means, preliminary auxiliary means, etc. for the recording head, which are provided as a configuration of the recording apparatus of the present invention, because the effects of the present invention can be further stabilized. Specifically, these include preheating means for the recording head using a caving means, a cleaning means, a pressurizing or suction means, an electrothermal transducer or another heating element, or a combination thereof. It is also effective to perform a preliminary ejection mode in which ejection is performed separately from printing in order to perform stable printing.

Furthermore, the recording mode of the recording device is not limited to a recording mode in which only the mainstream color such as black is used; the recording head may be configured integrally or in combination with a plurality of recording heads; The present invention is also extremely effective for devices equipped with at least one full color image.

In the embodiments of the present invention described above, the ink is explained as a liquid, but it is an ink that solidifies at room temperature or lower, and is softened or liquid at room temperature, or in the above-mentioned inkjet, the ink itself is heated at 30°C or higher and 70°C. Generally, the temperature is controlled within a range of 0.degree. C. or less so that the viscosity of the ink is within a stable ejection range, so it is sufficient that the ink is in a liquid state when the recording signal is applied. In addition, it is possible to actively prevent temperature rise due to thermal energy by using it as energy to transform the ink from a solid state to a liquid state, or to use ink that solidifies when left in order to prevent ink evaporation. Iruka,
In any case, the property of liquefying only by thermal energy, such as ink that is liquefied by application of thermal energy in accordance with a recording signal and ejected as liquid ink, or that has already begun to solidify by the time it reaches the recording medium. The use of ink is also applicable to the present invention. In such a case, the ink is held in a liquid or solid state in the recesses or through holes of the porous sheet, as described in JP-A-54-56847 or JP-A-60-71260. It may also be in a form that faces the electrothermal converter. In the present invention, the most effective method for each of the above-mentioned inks is to implement the above-mentioned film boiling method.

[Effects of the Invention] As described above, the present invention provides spurs whose circumferential surfaces are in continuous contact with the recording medium in the front and rear directions of the recording medium conveyance direction, and the spurs have a rotating shape, and the spurs are arranged on the recording surface side of the recording medium. In a configuration in which a conveyance guide is disposed in the recording device, when the recording medium is completely set in the recording device, the recording medium is moved in the conveyance scanning direction of the recording medium by providing a conveyance guide means that does not come into contact with the conveyance guide. Regardless, for example, even if pack feeding is performed in an inkjet recording apparatus, it is possible to prevent the problem of disturbing recorded images due to unfixed ink.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the recording device according to the first embodiment, FIG. 2 is an explanatory diagram of a conventional example in which a recording medium is set in the recording device, and FIGS. 3, 4, and 5 are diagrams of the second embodiment. FIG. 6 is an explanatory diagram of the conveyance guide of the embodiment; FIG. 8 is an explanatory diagram of the recording apparatus according to the second embodiment; FIGS. 9 and 10 are the main FIG. 2 is a diagram illustrating the shape of the spur according to the invention, which is a front view of the spur and a side view of the spur. 1 is a cartridge, 2 is a carriage, 3 is a guide shaft, 4
is a conveyance guide, 5 is a platen roller, 6 is a conveyance opening/ra, 7 is a conveyance roller, 8 is a conveyance roller, 9 is a support roller,
1O is a spur roller pattern holder, 11 is a guide spur, 12
13 is a pair of spur conveyor rollers, 14 is a pair of spur discharge rollers, and P is a recording medium. 675 Procedural amendment (method) % formula % Display of case 1990 Patent application Name of invention Ink sheet recording device Name to be corrected 5483 Relationship with address name case Patent applicant 3-30 Shimomaruko, Ota-ku, Tokyo (+00 ) Canon Co., Ltd. 4, Agent address: 1411 Tokyo University January-ku, Shikuryo 3 6, Specification subject to amendment 7, Statement of contents of amendment, page 29, line 14, ``Explanatory drawing,'' and ``No. Add the following text between "Figure 8". ``Figure 7 is an enlarged view of the conveyance guide portion, which is the main part of the embodiment of the present invention.''

Claims (3)

[Claims] (1) An inkjet recording device that has an ink tank that stores ink, includes an inkjet recording head that discharges the ink supplied from the ink tank, and performs recording by discharging ink droplets from the recording head onto a recording medium. An inkjet recording apparatus characterized in that spurs having a circumferential surface having a rotating shape that continuously abuts the recording medium are disposed at the front and rear of the recording medium conveying direction. (2) After setting the recording medium in the recording device,
2. The inkjet recording apparatus according to claim 1, wherein the recording medium has a conveyance guide means that does not come into contact with the conveyance guide. (3) The recording head has an electrothermal transducer that generates thermal energy, and the recording apparatus includes means for supplying a pulse signal that causes film boiling in the ink as a recording signal to the electrothermal transducer. Claim 1 or 2 comprising
The inkjet recording device described in 2.